Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction

Shanawar Hamid; Satwika Golagana; Seunghee Han; Giehyeon Lee; Moulay Rachid Babaa; Woojin Lee

doi:10.1016/j.chemosphere.2019.125115

Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction

Shanawar Hamid, Satwika Golagana, Seunghee Han, Giehyeon Lee, Moulay Rachid Babaa, Woojin Lee

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

In this study, a novel and highly reactive Sn–Pd catalyst supported by environmentally benign kaolinite (Sn–Pd-kaolinite) was developed and evaluated for stability for effective nitrate (NO₃⁻) reduction in batch and continuous mode. Complete NO₃⁻ removal with fast reduction kinetics (k = 18.16 × 10⁻² min⁻¹) and 71% selectivity toward N₂ were achieved by the Sn–Pd-kaolinite catalyst during batch reactions. During continuous tests, 100% NO₃⁻ removal and 80% N₂ was achieved for 60 h. However, NO₃⁻ removal efficiency gradually decreased to 80% in170 h. The catalyst was then successfully regenerated in the system by increasing H₂ flow which achieved a complete NO₃⁻ removal again. The metal leaching from catalyst surface was negligible (Sn 0.01% and Pd 0.006%) and the structure was stable during the continuous test, confirming that the Sn–Pd-Kaolinite catalyst had a superior reaction kinetics and operational durability.

Original language	English
Article number	125115
Journal	Chemosphere
Volume	241
DOIs	https://doi.org/10.1016/j.chemosphere.2019.125115
Publication status	Published - 2020 Feb

Bibliographical note

Funding Information:
The authors are sincerely thankful to all collaborators who can make this wonderful research achievement possible in the Global Environmental Geobiochemical Research Laboratory (EGRL) at Nazarbayev University and help start its wonderful scientific journey again. The research has been supported by Nazarbayev University Research Grants (Contract No. 284–2019//012–2019 and 076–2018 ). Appendix A

Publisher Copyright:
© 2019 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Environmental Engineering
Environmental Chemistry
Chemistry(all)
Pollution
Health, Toxicology and Mutagenesis

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title = "Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction",

abstract = "In this study, a novel and highly reactive Sn–Pd catalyst supported by environmentally benign kaolinite (Sn–Pd-kaolinite) was developed and evaluated for stability for effective nitrate (NO3−) reduction in batch and continuous mode. Complete NO3− removal with fast reduction kinetics (k = 18.16 × 10−2 min−1) and 71% selectivity toward N2 were achieved by the Sn–Pd-kaolinite catalyst during batch reactions. During continuous tests, 100% NO3− removal and 80% N2 was achieved for 60 h. However, NO3− removal efficiency gradually decreased to 80% in170 h. The catalyst was then successfully regenerated in the system by increasing H2 flow which achieved a complete NO3− removal again. The metal leaching from catalyst surface was negligible (Sn 0.01% and Pd 0.006%) and the structure was stable during the continuous test, confirming that the Sn–Pd-Kaolinite catalyst had a superior reaction kinetics and operational durability.",

author = "Shanawar Hamid and Satwika Golagana and Seunghee Han and Giehyeon Lee and Babaa, {Moulay Rachid} and Woojin Lee",

note = "Funding Information: The authors are sincerely thankful to all collaborators who can make this wonderful research achievement possible in the Global Environmental Geobiochemical Research Laboratory (EGRL) at Nazarbayev University and help start its wonderful scientific journey again. The research has been supported by Nazarbayev University Research Grants (Contract No. 284–2019//012–2019 and 076–2018 ). Appendix A Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = feb,

doi = "10.1016/j.chemosphere.2019.125115",

language = "English",

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journal = "Chemosphere",

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AU - Hamid, Shanawar

AU - Golagana, Satwika

AU - Han, Seunghee

AU - Lee, Giehyeon

AU - Babaa, Moulay Rachid

AU - Lee, Woojin

N1 - Funding Information: The authors are sincerely thankful to all collaborators who can make this wonderful research achievement possible in the Global Environmental Geobiochemical Research Laboratory (EGRL) at Nazarbayev University and help start its wonderful scientific journey again. The research has been supported by Nazarbayev University Research Grants (Contract No. 284–2019//012–2019 and 076–2018 ). Appendix A Publisher Copyright: © 2019 Elsevier Ltd

PY - 2020/2

Y1 - 2020/2

N2 - In this study, a novel and highly reactive Sn–Pd catalyst supported by environmentally benign kaolinite (Sn–Pd-kaolinite) was developed and evaluated for stability for effective nitrate (NO3−) reduction in batch and continuous mode. Complete NO3− removal with fast reduction kinetics (k = 18.16 × 10−2 min−1) and 71% selectivity toward N2 were achieved by the Sn–Pd-kaolinite catalyst during batch reactions. During continuous tests, 100% NO3− removal and 80% N2 was achieved for 60 h. However, NO3− removal efficiency gradually decreased to 80% in170 h. The catalyst was then successfully regenerated in the system by increasing H2 flow which achieved a complete NO3− removal again. The metal leaching from catalyst surface was negligible (Sn 0.01% and Pd 0.006%) and the structure was stable during the continuous test, confirming that the Sn–Pd-Kaolinite catalyst had a superior reaction kinetics and operational durability.

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Stability of Sn–Pd-Kaolinite catalyst during heat treatment and nitrate reduction in continuous flow reaction

Abstract

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